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目前对向心加速度的讨论除教材介绍的方法外,一些杂志上也给出一些新的方法。笔者在教学中用另一方法对向心加速度进行讨论,学生易于接受,效果较好。在此提出供大家参考。 1.匀速圆周运动的加速度的方向如图1所示。质点绕O点作匀速圆周运动,经过△t的时间,它从A点运动到B点,所对应的速度矢量从v_A变成v_B。加速度的方向即△_v,的方向,因△_v =v_B—
At present, the discussion of centripetal acceleration, in addition to the methods introduced in the textbook, also gives some new methods in some magazines. The author uses another method to discuss the centripetal acceleration in the teaching. The students are easy to accept and the effect is good. Here for your reference. 1. The direction of acceleration of uniform circular motion is shown in Figure 1. The particle rotates around the O point in a uniform circular motion. After Δt, it moves from point A to point B. The corresponding velocity vector changes from v_A to v_B. The direction of acceleration is the direction of △_v, because △_v =v_B—